Templated Anisotropic Analyses of the LISA Galactic Foreground
arXiv:2410.23260 · doi:10.1103/PhysRevD.111.023025
Abstract
The Laser Interferometer Space Antenna (LISA) will feature a prominent anisotropic astrophysical stochastic gravitational wave signal, arising from the tens of millions of unresolved mHz white dwarf binaries in the Milky Way: the Galactic foreground. While proper characterization of the Galactic foreground as a noise source will be crucial for every LISA science goal, it is extremely scientifically interesting in its own right, comprising -- along with resolvable white dwarf binaries -- a complete sample of every mHz white dwarf binary in our Galaxy. We present a novel Bayesian analysis of the LISA Galactic foreground that directly treats its anisotropy via astrophysically-motivated templates, allowing for a direct connection between the observed time-modulation of the foreground amplitude and the underlying spatial distribution of the Milky Way. We validate the efficacy of this approach via simulated data and show that it is able to accurately recover the foreground spectrum in the presence of LISA instrumental noise.
arXiv comment18 pages, 11 figures
References in corpus (73)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Astropy: A Community Python Package for Astronomy
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- Advanced LIGO
- The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
- Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
- Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
- The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
- Cosmological Backgrounds of Gravitational Waves
- Mass models of the Milky Way
- The construction and use of LISA sensitivity curves
- KAGRA: 2.5 Generation Interferometric Gravitational Wave Detector
- Detection methods for stochastic gravitational-wave backgrounds: a unified treatment
- The gravitational wave signal from the Galactic disk population of binaries containing two compact objects
- Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run
- The promise of multi-band gravitational wave astronomy
- The NANOGrav 15-year Data Set: Constraints on Supermassive Black Hole Binaries from the Gravitational Wave Background
- The NANOGrav 15-year Data Set: Observations and Timing of 68 Millisecond Pulsars
- Cosmology with the Laser Interferometer Space Antenna
- The second data release from the European Pulsar Timing Array I. The dataset and timing analysis
- Supernova Type Ia progenitors from merging double white dwarfs: Using a new population synthesis model
- Search for the isotropic stochastic background using data from Advanced LIGO's second observing run
- Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run
- Prospects for detection of detached double white dwarf binaries with Gaia, LSST and LISA
- The Parkes Pulsar Timing Array Third Data Release
- The LISA Gravitational Wave Foreground: A Study of Double White Dwarfs
- The gravitational wave signal from massive black hole binaries and its contribution to the LISA data stream
- Predicting the LISA white dwarf binary population in the Milky Way with cosmological simulations
- Capture of stellar--mass compact objects by massive black holes in galactic cusps
- The gravitational-wave background null hypothesis: Characterizing noise in millisecond pulsar arrival times with the Parkes Pulsar Timing Array
- Improved reconstruction of a stochastic gravitational wave background with LISA
- Prototype Global Analysis of LISA Data with Multiple Source Types
- Mapping gravitational-wave backgrounds using methods from CMB analysis: Application to pulsar timing arrays
- Discriminating between a Stochastic Gravitational Wave Background and Instrument Noise
- Global Analysis of the Gravitational Wave Signal from Galactic Binaries
- Searching For Anisotropic Gravitational-wave Backgrounds Using Pulsar Timing Arrays
- Probing Anisotropies of the Stochastic Gravitational Wave Background with LISA
- Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo's first three observing runs
- Detecting a stochastic gravitational wave background with the Laser Interferometer Space Antenna
- Stochastic Gravitational-Wave Background from Binary Black Holes and Binary Neutron Stars and Implications for LISA
- A radiometer for stochastic gravitational waves
- Space missions to detect the cosmic gravitational-wave background
- From Bright Binaries To Bumpy Backgrounds: Mapping Realistic Gravitational Wave Skies With Pulsar-Timing Arrays
- Gravitational wave radiometry: Mapping a stochastic gravitational wave background
- Gravitational wave background from extreme mass ratio inspirals
- Directional limits on persistent gravitational waves using data from Advanced LIGO's first two observing runs
- Properties of the stochastic astrophysical gravitational wave background: astrophysical sources dependencies
- StarTrack predictions of the stochastic gravitational-wave background from compact binary mergers
- The White Dwarf -- White Dwarf galactic background in the LISA data
- Unified model for the LISA measurements and instrument simulations
- Spectral separation of the stochastic gravitational-wave background for LISA in the context of a modulated Galactic foreground
- Maximum likelihood map-making with the Laser Interferometer Space Antenna
- Studying the anisotropy of the gravitational wave stochastic background with LISA
- Probing anisotropies of gravitational-wave backgrounds with a space-based interferometer: geometric properties of antenna patterns and their angular power
- Stochastic gravitational wave background reconstruction for a non-equilateral and unequal-noise LISA constellation
- Mapping Incoherent Gravitational Wave Backgrounds
- Second-Generation Time-Delay Interferometry
- Trojans in the Solar Neighborhood
- Mapping the Gravitational-wave Sky with LISA: A Bayesian Spherical Harmonic Approach
- Probing anisotropies of gravitational-wave backgroundswith a space-based interferometer II: Perturbative reconstruction of a low-frequency skymap
- The Milky Way's bar structural properties from gravitational waves
- Weighing Milky Way Satellites with LISA
- Applying the metallicity-dependent binary fraction to double white dwarf formation: Implications for LISA
- Impact of LIGO-Virgo black hole binaries on gravitational wave background searches
- Cataclysmic variables are a key population of gravitational wave sources for LISA
- The influence of star formation history on the gravitational wave signal from close double degenerates in the thin disc
- Bayesian parameter estimation for targeted anisotropic gravitational-wave background
- A Stochastic Gravitational Wave Background in LISA from Unresolved White Dwarf Binaries in the Large Magellanic Cloud
- Untargeted Bayesian search of anisotropic gravitational-wave backgrounds through the analytical marginalization of the posterior
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- Gravitational wave energy spectral density properties from BPASS Galactic binary population in the Milky Way galaxy
- Searching Stochastic Gravitational Wave Background Landscape Across Frequency Bands